Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 25, Issue 6, Pages 2988-2996Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2010.11.106
Keywords
Physical sulfate attack; Chemical sulfate attack; Silica fume; Fly ash; Diatomaceous earth
Categories
Funding
- JSPS [18680054]
- Grants-in-Aid for Scientific Research [18680054] Funding Source: KAKEN
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To emphasize the effect of physical sulfate attack on pozzolanic additions, the resistance of plain and blended cement mortars was investigated using 10% Na2SO4 and MgSO4 solutions under four exposure regimes which included the standard conventional exposure and field-like exposures that created the physical sulfate attack. Although the performance of blended cement mortars was observed to be better under a conventional exposure regime, the damage in blended cement mortars was more severe under the exposure regimes that promoted the physical sulfate attack in a Na2SO4 environment. However, the physical attack by MgSO4 was not apparent. Overall, MgSO4 was found to be more damaging than Na2SO4 from the aspect of chemical attack; however Na2SO4 was more harmful than MgSO4 as far as the physical attack is considered. (C) 2010 Elsevier Ltd. All rights reserved.
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